nim-libp2p/tests/helpers.nim

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{.push raises: [].}
import chronos
import algorithm
import ../libp2p/transports/tcptransport
import ../libp2p/stream/bufferstream
import ../libp2p/crypto/crypto
import ../libp2p/stream/lpstream
import ../libp2p/stream/chronosstream
import ../libp2p/muxers/mplex/lpchannel
import ../libp2p/protocols/secure/secure
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import ../libp2p/switch
import ../libp2p/nameresolving/[nameresolver, mockresolver]
import ./asyncunit
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export asyncunit, mockresolver
const
StreamTransportTrackerName = "stream.transport"
StreamServerTrackerName = "stream.server"
DgramTransportTrackerName = "datagram.transport"
trackerNames = [
LPStreamTrackerName,
ConnectionTrackerName,
LPChannelTrackerName,
SecureConnTrackerName,
BufferStreamTrackerName,
TcpTransportTrackerName,
StreamTransportTrackerName,
StreamServerTrackerName,
DgramTransportTrackerName,
ChronosStreamTrackerName
]
iterator testTrackers*(extras: openArray[string] = []): TrackerBase =
for name in trackerNames:
let t = getTracker(name)
if not isNil(t): yield t
for name in extras:
let t = getTracker(name)
if not isNil(t): yield t
template checkTracker*(name: string) =
var tracker = getTracker(name)
if tracker.isLeaked():
checkpoint tracker.dump()
fail()
template checkTrackers*() =
for tracker in testTrackers():
if tracker.isLeaked():
checkpoint tracker.dump()
fail()
# Also test the GC is not fooling with us
when defined(nimHasWarnBareExcept):
{.push warning[BareExcept]:off.}
try:
GC_fullCollect()
except:
discard
when defined(nimHasWarnBareExcept):
{.pop.}
type RngWrap = object
rng: ref HmacDrbgContext
var rngVar: RngWrap
proc getRng(): ref HmacDrbgContext =
# TODO if `rngVar` is a threadvar like it should be, there are random and
# spurious compile failures on mac - this is not gcsafe but for the
# purpose of the tests, it's ok as long as we only use a single thread
{.gcsafe.}:
if rngVar.rng.isNil:
rngVar.rng = newRng()
rngVar.rng
template rng*(): ref HmacDrbgContext =
getRng()
type
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WriteHandler* = proc(data: seq[byte]): Future[void] {.gcsafe, raises: [].}
TestBufferStream* = ref object of BufferStream
writeHandler*: WriteHandler
method write*(s: TestBufferStream, msg: seq[byte]): Future[void] =
s.writeHandler(msg)
method getWrapped*(s: TestBufferStream): Connection = nil
proc new*(T: typedesc[TestBufferStream], writeHandler: WriteHandler): T =
let testBufferStream = T(writeHandler: writeHandler)
testBufferStream.initStream()
testBufferStream
proc bridgedConnections*: (Connection, Connection) =
let
connA = TestBufferStream()
connB = TestBufferStream()
connA.dir = Direction.Out
connB.dir = Direction.In
connA.initStream()
connB.initStream()
connA.writeHandler = proc(data: seq[byte]) {.async.} =
await connB.pushData(data)
connB.writeHandler = proc(data: seq[byte]) {.async.} =
await connA.pushData(data)
return (connA, connB)
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proc checkExpiringInternal(cond: proc(): bool {.raises: [], gcsafe.} ): Future[bool] {.async, gcsafe.} =
let start = Moment.now()
while true:
if Moment.now() > (start + chronos.seconds(5)):
return false
elif cond():
return true
else:
await sleepAsync(1.millis)
template checkExpiring*(code: untyped): untyped =
check await checkExpiringInternal(proc(): bool = code)
proc unorderedCompare*[T](a, b: seq[T]): bool =
if a == b:
return true
if a.len != b.len:
return false
var aSorted = a
var bSorted = b
aSorted.sort()
bSorted.sort()
if aSorted == bSorted:
return true
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return false
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proc default*(T: typedesc[MockResolver]): T =
let resolver = MockResolver.new()
resolver.ipResponses[("localhost", false)] = @["127.0.0.1"]
resolver.ipResponses[("localhost", true)] = @["::1"]
resolver
proc setDNSAddr*(switch: Switch) {.gcsafe, async.} =
proc addressMapper(listenAddrs: seq[MultiAddress]): Future[seq[MultiAddress]] {.gcsafe, async.} =
return @[MultiAddress.init("/dns4/localhost/").tryGet() & listenAddrs[0][1].tryGet()]
switch.peerInfo.addressMappers.add(addressMapper)
await switch.peerInfo.update()